离心铸造自生颗粒增强Al-22Si-6Mg复合材料气缸套的制备及性能检测  

Preparation of Al-22Si-6Mg Aluminum Based Composites Cylinder Reinforced with In-Situ Particles by Centrifugal Casting and the Performance Tests

作　　者：林雪冬[1] 孙建[1] 叶京川[1] 张荣[1] LIN Xue-dong;SUN Jian;YE Jing-chuan;ZHANG Rong(College of Mechanical Engineering, Chongqing Vocational Institute of Engineering, Chongqing 402260, Chin)

机构地区：[1]重庆工程职业技术学院机械工程学院,重庆402260

出　　处：《铸造》2017年第11期1150-1154,共5页Foundry

基　　金：重庆市教委科研项目(KJ1503310)

摘　　要：采用离心铸造工艺制备自生硬质颗粒增强Al-22Si-6Mg复合材料筒状铸件,对铝合金缸套进行高压铸造,获得全铝发动机缸体。研究了铸件沿径向方向的微观组织特征,检测了铸件的耐磨性能。对缸体进行台架试验并进行铝合金缸体传热性能的理论计算。结果表明。The centrifugal casting process was adopted to fabricate Al-22Si-6Mg composites tubes reinforced with in-situ particles, which was used to produce the engine cylinder by high pressure die casting. The micro-structures characteristic along the radial direction of the tube was researched, and the wear resistance of the casting was examined. The inner layer of the Al-22Si-6Mg cylinder liner was dealt with and a bench test was carried out. Based on the experimental results, the heat transfer performance of the aluminum alloy cylinder was calculated. The results show that a large number of primary Si/Mg2Si particles are segregated in the inner layer of Al-22Si-6Mg casting, while no particle is in the outer layer. The wear resistance of the particle reinforcement layer of the Al-22Si-6Mg composites is better than that of the iron cylinder liner. The cylinder liner assembled on the air-cooled engine passes the endurance test of 200 h, and a slight scuffing occurs to the inner layer of the cylinder liner during the test, which indicates that the high temperature fatigue strength of it needs to be improved. The thermodynamic calculation results show that the heat transfer performance of the cylinder liner is at least 2.2 times than that of an iron cylinder liner.

关 键 词：Al-Si—Mg复合材料 气缸体 台架试验 耐磨性能 离心铸造 

分 类 号：TG249.4[金属学及工艺—铸造]